Driving-clutch for magnetos.



D. BLANDITI.

DRIVING CLUTCH EOR MAGNETOS.

APPLICATION FILED JAN 31 1916 1,225,754. Patented May15,1917

UNITED STATES PATENT OFFICE.

DEC'ENZIO BLANDI'I'I. OF ARBON, SWITZERLAND, ASSIGIiIOR TO THE FIRM ADOL PH SAURER, OF ARBOR, SWITZERLAND. 4

a citizen ofthe Swiss (onfetleratioii,' and residing at Arboii, Switzerland,have iiiconstituting. the play is wholly or-partially ,vented certain new and useful liiiprovenients in Drivingd lutches tor Magnetos. of which the following-is a specification. i This invention relates ,to dr ving); clutches -foi magnetos driven by motor-car engines and the like. I

in a inotor-ear, the shaltoi the magneto driven by the engine must be eonneeted with the engine'shaft in such a mannerthat the magneto (an be readily removed and re- .1

)laeed withoutliavin to detach and oin P up screwed connections. such. as si-i'e\v-bolts andthe like, and that in spite of its being frequently removed and replaeeih whereby the shafts are thrown out of exact alinement, correct working of the ends of the shafts coupled together is assured. lleretofore, claw-clutches have been employed for thep irpose mentioned. and'for meeting: the above requirements it is also well ltnown to provide play between the two halves of the eluteh;--this play, lu'nvei'er. has the disadvantage that when the direction ot' iotation ol' the driving member repeatedly changes.

which is the ease wi .11 magneto drives of the character referred to, the drivingtaees' become spoilt.

A primary object of this invention is to provide an improved clutch of the typedescribed which meets the above requirements and in whieh the-above. mentioned disadvantage is not present.

To this end, the suitably designed spare filled up. in such a. manner by aiielastie or spriiig-pressed member that the pressure of this intermediate iiiemberbn one half ogthe clutch is always greater than the maxi' n'nin force exerted gt'or driving the armature shaft of the magneto. 1 I

Accordingly, the invention consists in the construction, arrangement and combination of parts described hereinafter and pointed out in the. claims.

One illustrative embodiment of the iiivention and-a modification thereof are repi-eseiiteddiy way of example in the accompanying drawing, wherein Figures 1 and 2sho'wan improved claw- Specification of Letters Patent.

' againstits opposed face there is sufficient DRIVING- CLUTCH FOR MAGNETOS.

Patented May 15,1917,

I Application filed January 31, 1916. Serial No 75,846;

clutch in side and end sectional elevation, respectively. and

Fig.1 vis a erosssection on scale. while Fig. 4 shows a modified torni of clutch in an enlarged cross-section.

Referring to the drawing, the driving shatt n has a (-law 1! on its end constituting the one member of a clutch, while the driven shaft 1 carries the'aniiular element I) having: a reeess IF eonstituting the other memher of the eluteh. The claw a normally extends iuto the I'PPLSH 71*. play being. provided at f between the wall of the recess and the one tat-e ot' the elaw, as. clearly shown in l igs. I1 and l. The two eluteh memberscan be separated from. one another by themovei and of either member in an axial direction. According" to the invention an elastic member. 1'. y. a coiled spring: is provided in a bore or liole. or i" made, respectively. either in the member I) (Figs. l'to the via w a (Fig. M and opening at one end into the spare f constituting the play In order to assure easier and more reliable worhinewhen the shafts are not in alinement. the outer end of the spring: 6 bears so eess I)" in the modified forn shown in Fig 85 i, In both of these structures the rear end otthe spring 0 does not move on its seat, and the frontend bearing against-thediall is held in axial alinement by the ball fWhen the pressure holds the hall stationary space or play between the spring and'the bore wall to permit one. member of the eluteh to move axially with respect to the other a slight amount without causing the ball to roll out of alinenient with the axis otthe spring. The play in the clutch is thereby taken up by the elastic member 01" the spring-pressed ball with a pressure exerted on theone half of the clutch which is greater than the maxim i n'forceexerted for driving the driven shaft.

It; will be noted that the ball and spring are confined iii a tubular recess 0 or 0 so that the spring always exerts pressure on the ball in the direction of the axis of the spring and its tubular recess The ball and or in 75.

' spring are also retained in 'their recess so that one memberof the clutch may be removed from the 'companionmember by simple axial movement, without removing either the ball or the spring from its recess and ivithout danger of their falling out.

As shown in the drawing, the clutch may comprise only one claw, but if desired another claw may be provided diametrally opof said members, said ball being urged by the spring to project from the bore against the driving face of the other member, said spring and bore cooperating to prevent the ball from rollin out of alinement with the axis of the spring during axial movement of said members. i

2. The combination with a shaft having, a radial claw thereon constituting one member of a clutch, and-an annular element having a radially disposed recess therein and constituting the other member of said clutch, said clutch members being separable "by axial movement of either member, said annular element having a bore opening into said recess; of a coil spring retained'in said bore and arranged to exert pressure against said claw.

3. The combination with, a shaft. havinga radially disposed claw thereon constituting one member of a clutch, and an annular element having aradially disposed to receive said claw and constituting the other member of the clutch, said clutch members beingseparable by' the axial movement least equaljto the driving said -eq pressure. rIn todimony whereof, I'afix ny of either-member, one of said members havthe member; of a sprin of lms diameter than said bore, and a bal retained in said bore, said ball being urged -by the spring to 'ingva bore opening at the driving face of project from the bore against the driving ace of the other member with a force at premuro, whereby slight axial lplay of as members will not cause the be to roll out of alinement with the axisof the spring.

4-. The combination with a shaft having a radially dis claw thereon constitutm one mern r' of a clutch, and -an an nu or element having a radially disposed .recess to receive said claw and constituting the other clutchmombor ,said clutch members being separable her having a bore .from its periphery: to

'one of the faces of-said myof a spr ng the. axial movement of either member, on said annular memanda'ball retained-in said-bora-s'aidspnng 3 urging th'e ball to project from said bore and e the claw.

'5. :bination with a shaft having a radial claw thoroonconstitu {d1 recess therein for receiving ,sai claw and constituting the other member. of said clutch, said clutch members being axiallysoparablo, said ana bore opening into alal-element havuif d f a springm an o recsuof a co diameter said bore, a hall seated on one ond'of said spring and tllioend'gf thoboro one face of the ccawisai spf rtmga ro-iroatload.

ualto the di 'i vin'g p ture prosonooof two witnesses.

F i i i I' i t one membar of a clutch, anannul'areemont havm ."f 

